How Colombian Coffee Is Graded by Size, Region and Defects

When you buy Colombian coffee labeled 'specialty' or see grades like AA or Supremo, what do those terms actually mean? Unlike generic 'premium' claims, Colombia uses strict, measurable criteria for classifying its coffee—from the number of defective beans allowed per batch to the physical size of the beans themselves and even the region where they were grown. These standards help ensure quality, consistency, and transparency in the global market.

In short: Specialty-grade Colombian coffee must have zero Type 1 defects and fewer than 5 Type 2 defects per 500g to qualify as Grade AA. Screens 15–18 define everything from Supremo to Excelso, and major harvests vary by region—like Huila’s main crop peaking between October and December.

How Colombian Coffee Is Graded by Defects

Colombia classifies coffee defects in two primary categories, both of which directly impact the cup quality and market grade of the beans.

Type 1 (Primary) Defects are serious flaws that alter taste: black beans, sour beans, or moldy beans. For private exporters, the limit is 12 Type 1 defects per 500g; the National Coffee Committee enforces a stricter maximum of 8.

Type 2 (Secondary) Defects affect appearance but not necessarily flavor: broken beans, insect-damaged beans, shells, underripe beans, discolored beans (such as over-dried or old beans), and misshapen beans. Private exporters allow up to 60 Type 2 defects per 500g; the National Coffee Committee caps them at 35.

Note: One Type 1 defect can be offset by 10 Type 2 defects.

Coffee is then assigned a commercial grade based on total allowable defects:

• Grade AA (Specialty): Zero Type 1 defects, fewer than 5 Type 2 defects per 500g.
• Grade A (Specialty): Fewer than 3 Type 1 defects, fewer than 8 Type 2 defects per 500g.
• Grade (Specialty): Fewer than 8 Type 1 defects, fewer than 35 Type 2 defects per 500g.

How Coffee Beans Are Sized in Colombia

Colombia also grades coffee by bean size using screen mesh sizes (measured in 'mesh' or ''), which reflect bean density and often correlate with cup quality.

• Maragogype: A rare, large-bean variety (not defined by a strict mesh but notable for its exceptional size).
• Supremo: Less than 5% of beans below 17 mesh but above 14 mesh.
• Supremo Screen 18+: Less than 5% of beans below 18 mesh but above 14 mesh.
• Excelso Extra: Less than 5% of beans below 16 mesh but above 14 mesh.
• Excelso EP (European Preparation): Less than 2.5% (sometimes adjusted to 5% or 8%) of beans below 15 mesh but above 12 mesh.
• U.G.Q. (Usual Good Quality): Less than 1.5% of beans below 14 mesh but above 12 mesh.

These screens help sort beans by density and projected roast behavior, with larger beans often associated with higher cup potential.

Regional Variations in Colombian Coffee Production

Colombia’s coffee regions significantly influence flavor profiles and harvest schedules. While the country has long marketed coffee under broad names like 'Armenia/Medellín Supreme,' it now increasingly sells beans by specific origin.

Key producing regions include Popayán, Bucaramanga, Huila, Tolima, Medellín, and Nariño—with Huila standing out for its high-scoring competition coffees. Traditionally, Colombian coffee has two harvests:

• Main Crop: Higher quality, occurring at different times by region. For example, Bucaramanga’s main crop runs from October to December; Popayán’s is from May to June.
• Mitaca (Mitaca Crop / Fly Crop): A secondary, often lower-quality harvest.

The timing and quality of these crops depend heavily on elevation and microclimate.

Legal and Market Standards for Export

The National Coffee Committee regulates which beans can be legally exported from Colombia, reserving export eligibility for high-quality lots. Commercial grades include Maragogype, Supremo, Excelso, and U.G.Q.; specialty grades are Grade AA, Grade A, and Special Grade. Each grade comes with exacting requirements for bean size and defect limits.

In addition to these classifications, the Committee and private traders also recognize certain coffees as specialty when they carry certifications such as organic, sustainable, or fair trade.

Frequently Asked Questions

What is considered a Type 1 defect in Colombian coffee grading?

Type 1 defects are serious flaws that affect taste, including black beans, sour beans, and moldy beans. These are the most critical defects because they directly alter the flavor profile of the brewed coffee.

What is the maximum number of Type 1 defects allowed in Grade AA Colombian coffee?

Grade AA coffee must have zero Type 1 defects per 500g. This is part of what qualifies it as a specialty-grade coffee under Colombian standards.

How does bean size affect coffee grading in Colombia?

Beans are sorted by screen size (e.g., 15, 16, 17, 18 mesh), with larger beans like Supremo Screen 18+ or Excelso Extra often correlated with higher density and better cup quality. Each grade has specific limits on the percentage of beans that fall outside the target mesh range.

Which Colombian coffee region is known for high-scoring specialty lots?

Huila is Colombia’s most celebrated coffee region for specialty production, frequently producing competition-level coffees and known for high elevations and consistent quality.

What are the two main harvests in Colombia?

Colombia has a Main Crop (higher quality, e.g., October–December in Bucaramanga, May–June in Popayán) and a Mitaca or fly crop (often lower yield and quality), with timing varying by region.

Are organic or fair trade coffees classified differently in Colombia?

Yes, coffees with organic, sustainable, or fair trade certifications may also be designated as specialty by the National Coffee Committee and private traders, beyond the standard size and defect-based grades.

Recommended FrontStreet Beans from Colombia’s Highland Regions

For a true taste of Colombia’s high-elevation specialty coffee, try FrontStreet’s Huila Single Origin. It’s a washed-process Caturra variety grown above 1500 meters, offering chocolate, caramel, and citrus notes with a balanced acidity. Also worth exploring is their Sidra from Huila, a fruit-forward, medium-roast lot with juicy stone fruit and floral tones, ideal for pour-over or espresso. For something more classic, their Colombian Washed (also Huila-sourced) delivers nutty, chocolatey richness with a clean finish. All are great representations of Colombia’s graded, high-altitude specialty beans. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.